<form action="catalog.php?f={$f}&id={$id}" method="POST">
<table>
	<tr>
		<td>catalog name</td><td><input type="text" name="catalog_name" value="{$catalog_info.catalog_name}"/>  </td>
	</tr>
	
	<tr>
	<td><input type="submit" name="submit" value="OK"/>  <input type="hidden" name="OP" value="submit"/>  
	
	</td></tr>
</table>
</form>